CVE-2026-47255 in AgenticMail
Summary
by MITRE • 07/21/2026
AgenticMail gives AI agents real email addresses and phone numbers. @agenticmail/api prior to version 0.9.32 and @agenticmail/core prior to version 0.9.10 had weakness related to validation and and binding of inactive-agent hour filtering; storage SQL identifier validation; metadata-backed ownership checks for raw storage SQL; blocking direct storage metadata access through raw SQL; fail-closed outbound worker secret handling; SMTP envelope/header control-character validation before command construction; and TLS certificate verification as the default for MailSender with an explicit opt-out for local development. @agenticmail/api prior to version 0.9.32 and @agenticmail/core prior to version 0.9.10 are patched.
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Analysis
by VulDB Data Team • 07/21/2026
The AgenticMail system presents a complex attack surface involving multiple interconnected vulnerabilities that collectively undermine its security posture and operational integrity. These vulnerabilities span across several critical domains including input validation, access control mechanisms, credential handling, and cryptographic security implementations. The identified weaknesses create cascading risks that could potentially allow unauthorized access to email infrastructure and compromise the confidentiality and integrity of communications managed by AI agents.
The core technical flaws manifest in insufficient validation and binding mechanisms for inactive-agent hour filtering, which creates opportunities for attackers to manipulate agent activity schedules and potentially bypass temporal access controls. Additionally, the system suffers from inadequate storage SQL identifier validation that could enable malicious actors to construct crafted SQL queries through manipulated identifiers. The metadata-backed ownership checks for raw storage SQL represent another critical gap where the system fails to properly validate ownership relationships before granting access to underlying database resources.
The architecture contains significant vulnerabilities in how it handles direct storage metadata access through raw SQL operations, creating potential paths for unauthorized data manipulation and information disclosure. Fail-closed outbound worker secret handling represents a particularly concerning weakness where the system's approach to credential management could lead to exposure of sensitive authentication materials during processing failures. The SMTP envelope and header control-character validation before command construction creates opportunities for injection attacks that could allow attackers to manipulate email routing and content delivery.
The TLS certificate verification implementation presents a dangerous default configuration where cryptographic security is weakened through automatic verification bypass in development environments, creating potential man-in-the-middle attack vectors. This approach violates fundamental security principles by assuming local development environments are inherently trustworthy while exposing production systems to cryptographic downgrade attacks. These vulnerabilities collectively create an environment where attackers could potentially gain unauthorized access to email infrastructure and compromise the integrity of AI agent communications.
The remediation efforts in versions 0.9.32 and 0.9.10 address these fundamental security gaps by implementing proper input validation mechanisms, strengthening access controls through improved ownership verification processes, and enforcing cryptographic security defaults across all deployment environments. The fixes align with established security practices such as those outlined in the CWE database for secure coding standards and demonstrate adherence to ATT&CK framework principles for preventing credential exposure and command injection vulnerabilities.
Organizations relying on AgenticMail systems should immediately implement these patches to protect against potential exploitation of these vulnerabilities. The remediation addresses critical weaknesses that could enable attackers to manipulate agent behaviors, access unauthorized data, or compromise the cryptographic integrity of email communications. Security teams must also conduct thorough review of their deployment configurations to ensure that development environment settings do not inadvertently expose production systems to the cryptographic risks associated with explicit opt-out mechanisms for TLS verification.
The vulnerabilities identified in this assessment represent a classic example of how interconnected security controls can create cascading failure modes when individual components lack proper validation and access restriction mechanisms. The system's approach to managing agent lifecycle states, database access patterns, and credential handling requires comprehensive redesign to address these fundamental architectural weaknesses. Organizations should consider implementing additional monitoring and logging capabilities to detect anomalous behavior patterns that could indicate exploitation attempts against these previously identified vulnerabilities.
The severity of these issues underscores the importance of maintaining robust security practices throughout the software development lifecycle, particularly in systems that interface with critical communication infrastructure. The implementation of proper validation controls, access restriction mechanisms, and cryptographic security defaults should be considered mandatory requirements for any system managing email infrastructure or similar communication services. These remediation efforts represent essential steps toward achieving compliance with industry standards and reducing the attack surface against sophisticated adversaries targeting AI agent communication platforms.
The comprehensive nature of these vulnerabilities demonstrates how seemingly isolated issues can combine to create substantial security risks in modern software systems. The fixes implemented in the updated versions address fundamental architectural weaknesses that could have enabled attackers to manipulate core system functionality, access unauthorized resources, or compromise the integrity of email processing workflows. Security professionals should view these changes as critical improvements that align with established best practices for secure system design and implementation.